Pressure-motor.



H. C. BREHMER. PRESSURE MOTOR.

APPLICATION FILED FEB. 3. 1915.

Patented June 22, 1915.

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WITNESSES THE NORRIS PETERS 50.. PHOTO-LITHQ. WASHINGION, D. c.

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HERMAN C. BREI-IMER, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'IO H. W.

BUTTERWOBTI-I 8c SONS COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A COR-PORATION. OF PENNSYLVANIA.

PRESSURE-MOTOR.

Specification of Letters Patent.

Patented June 22, 1915.

Original application filed June 12, 1914, Serial No. 844,635. Dividedand this application filed February 3, 1915;. Serial No. 5,836.

To all whom it may concern.

Be it known that I, HERMAN BRm-IMER, a citizen of the United States, andresident of Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented an Improvement in Pressure-Motors, of whichthe following is a specification.

This application is a division of application Serial No. 8%,635, filedJune12, 1914 for guide mechanism for cloth, and the pres ent inventionrelates to a pressure motor and consist of certain improvements whichare fully set forth in the following specification and shown in theaccompanying drawings which form a part thereof.

The object of my invention is to provid a mortor device controlled by asuitable fluid pressure adapted more particularly for operation by atrip mechanism whereby all parts of said motor are constructed forsensitive and delicate action, being adjusted to respond substantiallyinstantaneously upon a variation of the normal working condi- It has forafurther object to provide a motor wherein a movable part thereof isaccurately and positively guided while the bearing of said movablemember is so constructed that other adjustments of other adjuncts of themotor have no eifect uponthe said movable part.

With the above and other objects in view, the nature of which will bemore fully understood from the description hereinafter, the inventionconsists in the novel construction of motor device as hereinafter. morefully described and defined in the claims.

Referring to the drawings: Figure 1 represents a section-on line aid-aof Fig. 2; Fig. 2 represents a sectional elevation of a motor deviceembodying my invention; Fig. 3 represents a plan of one of the bearingmembers forming a part of the motor construction. C

16 designates a post of suitable form and mounted upon a suitablefixedsupport in order to form a hanger or retaining means.

for the tubular extension 20 of a cylinder 21,

the said extension projecting through the post 16 and being screwthreaded to receive the nut 22 by which the parts are secured inassembled condition. One end of the cylinder 21 is closed and providedwith exhaust ports 23, while the opposite open end has screw threadedengagement with a casing 24:, within which is located the valvemechanlsm for controlling the operation of the parts contained withinthe cylinder 21. These parts comprise a piston 25 mounted for freereciprocatory movement within the cylinder and carrying a plunger 26 atone side which passes through and projects from the extension 20 for thepurpose of actuating a suitable mechanism which is adapted to beautomatically controlled by movements of the said plunger. The upperportion of this casing 24: acts as a head or closure for the cylinder21. The opposite side of the piston 25 is provided with a stem 27journaled in an apertured disk or spider 28 by which the said pistonisaccurately centered so that it may reciprocate properly withoutbinding or becoming distorted in use.

29 designates a spring encircling the plunger 26 and held between thepiston 25 and the extension 20 so that its tendency is to return thepiston 25 to normal position after the motive fluid has actuated thesaid piston.

In connection with the member 28 it will be noted that the outer ends ofthe radial arms thereof are circumferentially milled or machined asshown at 30, whereby one portion of the bearing member accurately fitsthe interior of the cylinder 21, while the re maining portion 30 seatsbetween the shoulder 31 of the cylinder 21 and the threaded part 32 ofthe casing 24. It will further be seen that the part 30 has a thicknesspreferably less than the space in which it is seated in order to providea slight clearance when the casing 2a has been properly assembled on thecylinder 31. This clearance prevents the spider 28 from being clamped ina fixed manner between the two parts and thus effectually eliminatestwisting or buckling which would impair the proper movement of thepiston 25.

33 designates the body portion of a valve member having oppositelydisposed stems 34 and 35, theformer' passing through the closure cap 36at oneside of the casing,wh1le the latter projects through the oppositeside and is held by a screw 37 and washer 38 or like fastening means,though it will be noted that this connection is not such as to preventfree movement of the body portion w1th1n j the casing 24. The body part33 is suitably bored to form intersecting channels 39 and 40, the formerhaving communlcation with a port 41, which in certain positions of thevalve body comes into alinement with the inlet conduit 42 for compressedair or other motive fluid.

43 designates the valve plug having a portion of its length of tubularform and seating within the bore 40. This plug, as here shown, isprovided with a pair of ports 44 adapted to aline at certain times withsimilar ports 45 provided in the wall of the we ing 24 and communicatingwith the interior of the cylinder 21. When the two sets of ports 44 and45 are in alinement, the motive fluid has free passage into the cylinder21 and to one side of the piston 25, as will be understood.

46 designates an exhaust port or channel cut in the outer face of thevalve piece adjacent the ports 44 and preferably extending from one sideof the plug to the other so that when it in turn is in alinement withthe ports 45 the pressure in the end of the cylinder 21 will be relievedand the motive fluid exhausted by way of the port 46 into the interiorof the casing and from which it has free access to the outside of thecasing by way of the opening 4'1 or the like. This opening 47 permitsaccess to the valve body, and it will be noted that one end of the port40 is closed by a screw 48 so that upon its removal a suitable implementor tool may be inserted to adjust the valve piece 43 for wear. The valvepiece is ordinarily fixed in adjusted position by a set screw 49 inalinement with which is an opening 50 in the casing so that the screwmay be readily manipulated. The screw 51 which is threaded through thecasing 44 serves as a stop to limit the throw of the valve body.

52 designates a rod adjustably mounted on the projecting end of thevalve stem 34 I and having one end threaded to receive a counterweight53 while intermediate its length there is a trip arm 54 which extendsinto the path of movement of the'trip finger 55. The counterweight 53 isnormally adjusted so that the valve body 33 is positioned with the ports44 in register with the ports 45, and since at this time the inlet port41 is in alinement with the channel 42 the motive fluid has a freepassage into the cylinder 21 and therefore maintains the plunger 26outwardly pressed.

It will be understood that the trip finger 55 may form a part of anytype of machine in which regulation is required to be automaticallyobtained through the operation of the plunger 26 and the trip finger is,of course, so adjusted and arranged as to cause o eration of the motorat the proper time. Under normal conditions the counterweight 53 holdsthe valve stem 34 in a position to admit pressure fluid toone side ofthe piston 25, thus forcing the plunger 26 outwardly in order to bearagainst and operate the parts controlled thereby. The action of the ripfinger is to shift 'the arm 54 in such a manner as to raise the rod 52against the weight 53 and thereby swing the valve piece 43 into exhaustposition with the channel 46 in register with the ports 45. Inconsequence the pressure within the cylinder 21 is relieved and thespring 29 forces the plunger inwardly to its inoperative position.Attention is particularly directed to the function of the spider bearingmember 28 which serves to accurately maintain the plunger properlycentered, as'well as the piston itself, and adjustment of the parts or achange of relation between them does not interfere with the properalinement of the spider member.

It will now be apparent that I have devised a novel and usefulconstruction which embodies the features of advantage enumerated asdesirable, and while I have in the present instance shown and describedthe preferred embodiment thereof which has been found in practice togive satisfactory and reliable results, it is to be understood that I donot restrict myself to the details, as the same are susceptible ofmodification in various particulars without departing from the spirit orscope of the invention.

Having now described my invention, what I claim as new and desire toprotect by Letters Patent is v 1. In a device of the character stated, asuitable supporting frame, a cylinder mounted on said frameya headdetachable from the cylinder, a piston in said cylinder having a plungerat" one end projecting through and guided'by the cylinder wall, a stemat the opposite'end of said piston wholly within the cylinder, a bearingmember snugly fitting the bore of said cylinder to hold it againstlateral movement but movable axially of said cylinder to a slight extentfor guiding said stem- "and maintaining said plunger centered in thecylinder, and means to operate said piston and plunger. v

2. In a device of the character stated, a suitable supporting "frame, acylinder mounted on said frame,-a piston positioned a in said cylinderhaving a plunger at one end projecting through and guided by the-cylinder wall and also having a stem at "its op-' posite end, a'spidermember having a central opening to guide and form a bearing forsaid stem, said spider member having.

tion secured to the lower end of the cylinder and holding the spidermember in loose operative relation with the cylinder.

3. In a device of the character stated, a suitable supporting frame, acylinder fixed to the frame and having one end closed, a piston in saidcylinder having a plunger at one end guided through the closed end ofthe cylinder and also having a stem at the other end, a valve mechanismsecured to the open end of the cylinder and forming an annular spacebetween it and the end of the cylinder, a guide for the stem of thepiston provided with openings through it and also having its peripheryarranged to fit the cylinder whereby it is centered, and having alsoradial portions loosely fitting the annular space and permitting slightmovement in the axial direction of the piston whereby the guide isaccurately positioned and at no time clamped against movement.

4. In a device of the character stated, a cylinder open at one end, avalve casing secured to the open end of the cylinder to close it andproviding an annular clearance between the valve casing and the interiorof the cylinder wall said valve casing having a centrally arranged portopening into the cylinder, a piston arranged within the cylinder andhaving a plunger projecting through one end of the cylinder and alsohaving a stem at the other end extended down to a position in alinementwith the port, and a bearing member fitting the bore of the cylinder andthrough which the stem extends to maintain the stem centered in thecylinder and said bearingmember having radial portions extending intothe an nular clearance between the casing and cylinder and with capacityfor slight movement axially of said cylinder.

5. The combination of a cylinder, a valve casing secured in one end ofthe cylinder and providing lateral clearances of the wall of thecylinder arranged annularly about its axial center, valve devices forcontrolling a pressure fluid to and from the cylinder, a piston Withinthe cylinder having a plunger portion extending from one side and with astem portion extending from the other side in axial line with the centerof the cylinder, and a bearing member in which the stem is guided saidbearing member closely fitting the interior of the cylinder whereby itis centralized and having lat eral extensions projecting into thelateral clearances between the cylinder and valve casing.

6. The combination of a cylinder, a valve casing secured in one end ofthe cylinder and providing lateral clearances of the wall of thecylinder arranged annularly about its axial center, valve devices forcontrolling a pressure fluid to and from the cylinder, a piston withinthe cylinder having a plunger portion extending from one side and with astem portion extending from the other side in axial line with the centerof the cylinder, and a bearing member in which the stem is guided saidbearing mem ber closely fitting the interior of the cylinder whereby itis centralized and having lateral extensions loosely projecting into thelateral clearances between the cylinder and valve casing with capacityfor small axial movement relatively to the cylinder and valve casing andsaid bearing member having a hub with radially extending portionsproviding passages between them.

In testimony of which invention, I hereunto set my hand.

HERMAN C. BREHMER.

Witnesses:

E. W. SMITH, FLORENCE DEACON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

